ADM207E(1998) Просмотр технического описания (PDF) - Analog Devices

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производитель

ADM207E
(Rev.:1998)

EMI/EMC-Compliant, ±15 kV ESD­ Protected, RS-232 Line Drivers/Receivers

Analog Devices 

ADM206E/ADM207E/ADM208E/ADM211E/ADM213E

T3OUT 1

28 T4OUT

T1OUT 2

T2OUT 3

27 R3IN

26 R3OUT

R2IN

R2OUT

T2IN

T1IN

4

25 SHDN

5 ADM213E 24 EN

6

TOP VIEW

(Not to Scale)

23 R4IN*

7

22 R4OUT*

R1OUT 8

21 T4IN

R1IN 9

20 T3IN

GND 10

19 R5OUT*

VCC 11

C1+ 12

18 R5IN*

17 V–

V+ 13

C1– 14

16 C2–

15 C2+

*ACTIVE IN SHUTDOWN

Figure 9. ADM213E Pin Configuration

+5V INPUT

0.1␮F

16V

0.1␮F

16V

12 C1+

14 C1–

+5V TO +10V VCC 11

VOLTAGE

DOUBLER V+ 13

15 C2+ +10V TO –10V

VOLTAGE V– 17

16 C2– INVERTER

0.1␮F

6.3V

0.1␮F

16V

0.1␮F

T1IN

7

T1

2

T1OUT

TTL/CMOS

INPUTS*

T2IN

6

T3IN

20

T4IN

21

R1OUT

8

R2OUT

5

TTL/CMOS

OUTPUTS

R3OUT

26

R4OUT*** 22

T2

T3

T4

R1

R2

R3

R4

3

T2OUT

RS-232

OUTPUTS

1

T3OUT

28

T4OUT

9

R1IN

4

R2IN

27

R3IN

RS-232

INPUTS**

23

R4IN***

R5OUT*** 19

EN 24

R5

18

GND ADM213E 25

10

R5IN***

SHDN

*INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH CMOS INPUT

**INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT

***ACTIVE IN SHUTDOWN

Figure 10. ADM213E Typical Operating Circuit

PIN FUNCTION DESCRIPTIONS

Mnemonic

VCC

V+

V–

GND

C1+, C1–

C2+, C2–

TIN

TOUT

RIN

ROUT

EN/EN

SHDN/SHDN

Function

Power Supply Input: +5 V ± 10%.

Internally Generated Positive Supply (+9 V nominal).

Internally Generated Negative Supply (–9 V nominal).

Ground Pin. Must Be Connected to 0 V.

External Capacitor 1 is connected between these pins. 0.1 µF capacitor is recommended but larger capacitors up

to 47 µF may be used.

External Capacitor 2 is connected between these pins. 0.1 µF capacitor is recommended but larger capacitors up

to 47 µF may be used.

Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kΩ pull-up resistor to VCC

is connected on each input.

Transmitter (Driver) Outputs. These are RS-232 signal levels (Typically ± 9 V).

Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is

connected on each input.

Receiver Outputs. These are CMOS output logic levels.

Receiver Enable (Active High on ADM213E, Active Low on ADM211E); This input is used to enable/disable the

receiver outputs. With EN = Low ADM211E (EN = High ADM213E), the receiver outputs are enabled. With EN

= High (EN = Low ADM213E), the receiver outputs are placed in a high impedance state.

Shutdown Control (Active Low on ADM213E, Active High on ADM211E); Refer to Table II. In shutdown the

charge pump is disabled, the transmitter outputs are turned off and all receiver outputs (ADM211E), receivers R1,

R2, R3 (ADM213E) are placed in a high impedance state. Receivers R4 and R5 on the ADM213E continue to

operate normally during shutdown. Power consumption in shutdown for all parts reduces to 5 µW.

–6–

REV. B

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